a new *current* release from bogofilter team. if it works it'll be move to stable in a week or so.
Created attachment 42237 [details, diff] bogofilter-0.92.7-0.92.8.patch
Looks like Brandon bumped bogofilter, but forgot to close this bug. Anyway, he forgot to remove installing of non-existent tarball files from the new ebuild, so I modified it according to your patch and am closing this bug now. Thanks for the patch.